The reason I ask is b/c I did B2S shopping today and my twin boys moved up to a men's 7 (women's 8.5). Tonight when we were out with friends their 13yr old DD said she only wore a women's 5. And their 10yr old son wore a 3 boys. Do my boys have big feet for kids that just turned 10 or is that about normal? I'll find out their height and how much they've grown next week, at their 10yr old well visit.